Tree exploration with logarithmic memory
Tree exploration with logarithmic memory
复制标题
使用对数内存进行树探索
DOI:
10.1145/1921659.1921663
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发表时间:
2011
影响因子:
1.3
通讯作者:
Ambühl C
中科院分区:
文献类型:
--
作者:
Ambühl C
We consider the task of network exploration by a mobile agent (robot) with small memory. The agent has to traverse all nodes and edges of a network (represented as an undirected connected graph), and return to the starting node. Nodes of the network are unlabeled and edge ports are locally labeled at each node. The agent has no a priori knowledge of the topology of the network or of its size, and cannot mark nodes in any way. Under such weak assumptions, cycles in the network may prevent feasibility of exploration, hence we restrict attention to trees. We present an algorithm to accomplish tree exploration (with return) usingO(logn)-bit memory for alln-node trees. This strengthens the result from Diks et al. [2004], whereO(log2n)-bit memory was used for tree exploration, and matches the lower bound on memory size proved there. We also extend ourO(logn)-bit memory traversal mechanism to a weaker model in which ports at each node are ordered in circular manner, however, the explicit values of port numbers are not available.
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影响因子:
1.1
作者:
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通讯作者:
Yiftach Ravid
DOI:
--
发表时间:
1988
期刊:
Symposium on the Theory of Computing
影响因子:
--
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S. Istrail
DOI:
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期刊:
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DOI:
10.1145/276698.276759
发表时间:
1998
期刊:
J. Vis. Lang. Comput.
影响因子:
--
作者:
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通讯作者:
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